
Description: GorillaPDF is a free PDF editor that allows you to view, annotate, and edit PDF documents. It has editing tools like adding text, highlighting, drawing shapes, adding images, and more. GorillaPDF is good for basic PDF editing needs.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: PDFDad is free PDF editing software for Windows that allows you to edit, annotate, convert, and sign PDF documents. It has basic features like adding text, highlighting, inserting images and shapes, as well as more advanced options like redacting text and merging PDFs.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API